He was in diplomatic missions in Europe (beginning in August 1919) and the United States (from October 9, 1919 until August 1920). During the battle for Zangibasar (modern-day Masis) on 19–21 June 1920, Kajaznuni's son Aram (a lieutenant in the Armenian army) was killed by Tatar rebels—this was the second son he had lost in battle since 1918. Kajaznuni later returned to Armenia to become chairman of the parliament on November 4, 1920. Kajaznuni was arrested after the Bolsheviks came to power in December 1920 but was freed during the February 1921 revolt against the Soviet regime. Soviet Period After the end of the revolt in early April 1921, he left the country and lived in Bucharest from 1921 to 1924. In 1925 he returned to Soviet Armenia and worked as an architect in Leninakan. He also taught at the technical department of Yerevan State University, lecturing on construction and architecture. In 1930 he joined the newly established Construction Institute and attained the title of professor there. Kajaznuni became a member of the Armenian Union of Architects. Kajaznuni was a victim of Stalin's Great Terror—arrested in 1937 and imprisoned, he died in prison in 1938. The exact date of his death is unknown. Report to the 1923 ARF Congress Kajaznuni prepared a critical report for the Armenian Revolutionary Federation party convention held in Bucharest during April 1923 (the 10th Congress of the Party was held in 1924-1925) titled Dashnaktsutyun Has Nothing More to Do, which called for the party's support of Soviet Armenia. Before this event, every single Armenian political party in exile was opposed to Soviet Armenia's stance. Kajaznuni published his report in Vienna in 1923. In the same year it was republished by non-A.R.F. circles in Tbilisi, Alexandria (Egypt), and Bucharest. Its claims immediately drew rebuke from the party. In 1927, Zakkniga in Tiflis published a Russian translation of Kajaznuni's report in an edition of 2,000 copies, with an introduction by S. Khanoyan. A condensed version of the report was translated into English in 1955 by Matthew Aram Callender, and edited by Arthur Derounian. In the introduction written by Derounian (whose birth name was Avedis Boghos Derounian), an anti-Dashnak journalist, Kajaznuni is described as a "patriot" whose report was a "deep and incisive self-study" that is a "refutation" of the "grandiose, exaggerated and even outrageously false claims of the Dashnag leadership today". The Armenian original was reprinted twice